diff --git a/libc/kernel/arch-arm/asm/spinlock.h b/libc/kernel/arch-arm/asm/spinlock.h
new file mode 100644
index 0000000..3ae2173
--- /dev/null
+++ b/libc/kernel/arch-arm/asm/spinlock.h
@@ -0,0 +1,27 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   This header was automatically generated from a Linux kernel header
+ ***   of the same name, to make information necessary for userspace to
+ ***   call into the kernel available to libc.  It contains only constants,
+ ***   structures, and macros generated from the original header, and thus,
+ ***   contains no copyrightable information.
+ ***
+ ****************************************************************************
+ ****************************************************************************/
+#ifndef __ASM_SPINLOCK_H
+#define __ASM_SPINLOCK_H
+
+#if __LINUX_ARM_ARCH__ < 6
+#error SMP not supported on pre-ARMv6 CPUs
+#endif
+
+#define __raw_spin_is_locked(x) ((x)->lock != 0)
+#define __raw_spin_unlock_wait(lock)   do { while (__raw_spin_is_locked(lock)) cpu_relax(); } while (0)
+
+#define __raw_spin_lock_flags(lock, flags) __raw_spin_lock(lock)
+
+#define rwlock_is_locked(x) (*((volatile unsigned int *)(x)) != 0)
+#define __raw_write_can_lock(x) ((x)->lock == 0x80000000)
+#define __raw_read_can_lock(x) ((x)->lock < 0x80000000)
+#endif